CVE-2026-90800

Missing authorisation checks in chttpd in Apache CouchDB 3.5.2 and below on all platforms allows any request to read the full contents of a prefixed _user or _replicator database via an unauthorised API endpoint. The use of prefixed system databases is very rare. Users are recommended to upgrade to version 3.5.3, which fixes this issue.

Score

CVSS 4.0 8.1 High

Status

Deferred - security@apache.org

Published

2026-10-20

Last modified

2026-10-20

Weaknesses

CWE-862

Affected products

• Apache Couchdb (Apache Software Foundation)

References

• https://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0f
• https://lists.apache.org/thread/vng8vqjwgy1qlrv14wzrgs7pv4gj7gwr
• http://www.openwall.com/lists/oss-security/2026/10/20/15